Goy (plural Goyim, adjective Goyish) is a Yiddish expression used against Gentiles as a form of contempt. Many Jews used this word to negatively refer to Christians.
Rabbi Ovadia Yosef described the meaning of the word in 2010:
Goyim were born only to serve us. Without that, they have no place in the world – only to serve the People of Israel.
In Israel, death has no dominion over them… With gentiles, it will be like any person – they need to die, but [God] will give them longevity. Why? Imagine that one’s donkey would die, they’d lose their money.
This is his servant… That’s why he gets a long life, to work well for this Jew.
Why are gentiles needed? They will work, they will plow, they will reap. We will sit like an effendi and eat.
That is why gentiles were created.